This name is a synonym of Rumex bucephalophorus L..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bol. Soc. Brot. II, 54: 241 1980-1981 publ. 1981.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:916160-1.
This name was in version 1 of The Plant List, record kew-2684724, and has not been changed.